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lab:pigi:hardware [2013-07-27 11:23] – [Recommended Hand Solder Order] chronolab:pigi:hardware [2023-04-19 13:56] (current) – [High Voltage] chrono
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 | T1 | NPN transistor with a >=1kV collector-emitter breakdown voltage | [[https://mouser.com/Search/ProductDetail.aspx?R=STN0214virtualkey51120000virtualkey511-STN0214|STN0214]] | | T1 | NPN transistor with a >=1kV collector-emitter breakdown voltage | [[https://mouser.com/Search/ProductDetail.aspx?R=STN0214virtualkey51120000virtualkey511-STN0214|STN0214]] |
  
-The inductor is a high Q wound dust core choke with shielding to minimize EMI. The output voltage is set by the maximum current, which is controlled by the adjustable trimmer (R10) in the emitter lead of the STN0214. A lower resistor value (turning CCW) wil result in higher output voltage. Alternatively, when only a certain type of GMT is going to be used with a PiGI module, R10 can be replaced with R10a to set the specific required voltage for the GMT. Please add working values for R10(a) with your particular tube to the [[lab:pigi:common-geiger-tube-parameter]].+The inductor is a high Q wound dust core choke with shielding to minimize EMI. The output voltage is set by the maximum current, which is controlled by the adjustable trimmer (R10) in the emitter lead of the STN0214. A lower resistor value (turning CCW) will result in higher output voltage. Alternatively, when only a certain type of GMT is going to be used with a PiGI module, R10 can be replaced with R10a to set the specific required voltage for the GMT. Please add working values for R10(a) with your particular tube to the [[lab:pigi:common-geiger-tube-parameter]].
  
 Based on the CMOS 555 Based on the CMOS 555
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 | < 100 V1.1 | EUR 4,97 | EUR 9,70 | Hand (EUR 0) |  20%  | TBD | | < 100 V1.1 | EUR 4,97 | EUR 9,70 | Hand (EUR 0) |  20%  | TBD |
 | >= 100 V1.1 | EUR 2,79 | EUR 7,05 | Outsourcing (TBD) |  15%   | TBD | | >= 100 V1.1 | EUR 2,79 | EUR 7,05 | Outsourcing (TBD) |  15%   | TBD |
-| >= 1000 V1.1 | EUR 0,70 | EUR 3,95 | Outsourcing (TBD) |  10%  | TBD  |+| >= 1000 V1.1 | EUR 0,70 | EUR 3,95 | Outsourcing (TBD) |  10%  | TBD | 
 + 
 +As we can see, it scales very well with numbers and a non-profit oriented production run could bring many modules to people for less than 20 EUR. If it were sold for more than 25 EUR (fully assembled), someone would really be ripping people off.
 ===== Assembly Instructions ===== ===== Assembly Instructions =====
  
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 | 10M (Fluke-87V internal resistor) | 230V | 230V | | 10M (Fluke-87V internal resistor) | 230V | 230V |
 | 10M + 42.3M (9x 4.7MOhm in series) | 63.7V | 333V | | 10M + 42.3M (9x 4.7MOhm in series) | 63.7V | 333V |
-| 10M + 1G ([[http://www.highvoltageshop.com/shop/article_RES_20kV_1G/Hochspannungswiderstand-20kV-1-GigaOhm-Messwiderstand%2C-Entladewiderstand.html|20kV 1 GigaOhm single resistor]]) | 4.56V | 460V |+| 10M + 1G ([[http://highvoltageshop.com/epages/b73088c0-9f9a-4230-9ffc-4fd5c619abc4.sf/de_DE/?ObjectPath=/Shops/b73088c0-9f9a-4230-9ffc-4fd5c619abc4/Products/RES_20kV_1G|20kV 1 GigaOhm single resistor]]) | 4.56V | 460V |
  
 Measured at: [+] Cathode of D1 (pin facing towards R2) [-] Cathode of GM Tube (HV- Pad) Measured at: [+] Cathode of D1 (pin facing towards R2) [-] Cathode of GM Tube (HV- Pad)
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 **Formula** **Formula**
  
-<x>+<m>
 V_actual = V_read * {{ R_meter + R_probe } / R_meter} V_actual = V_read * {{ R_meter + R_probe } / R_meter}
-</x>+</m>
  
 **Examples** **Examples**
  
-<x>+<m>
 63.7V * {{10 MOhm + 42.3 MOhm} / {10 MOhm}} \approx 333V  63.7V * {{10 MOhm + 42.3 MOhm} / {10 MOhm}} \approx 333V 
-</x>+</m>
  
-<x>+<m>
 4.56V * {{10 MOhm + 1000 MOhm} / {10 MOhm}} \approx 460V  4.56V * {{10 MOhm + 1000 MOhm} / {10 MOhm}} \approx 460V 
-</x>+</m>
  
  
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 ===== Radioactive Test Sources ===== ===== Radioactive Test Sources =====
  
-Since everything is regulated these days up to the point that only multi-national-companies can obtain the stuff they need to develop something it's quite a challenge to find sources to test your Geiger Counter with more than just the local dose rate. +Since everything is over-regulated these days, up to the point where only multi-national-corporations can obtain the resources needed to develop something easily, it's quite a challenge to find radioactive test sources to probe a Geiger Counter with more than just the local dose rate. So instead of having simple access to quality test-radiators which can be handled and stored in a safe manner, we have to improvise and hack something out of whatever we can find. When we consider that the regulation's original intent has to protect of people from harm, it backfired pretty well. 
  
 The mightyohm blog has compiled a list of things you can try to use:  The mightyohm blog has compiled a list of things you can try to use: 
Trace:

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